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RedHat 9 (Linux i386) - man page for dlamch (redhat section l)

DLAMCH(l)					)					DLAMCH(l)

NAME
       DLAMCH - determine double precision machine parameters

SYNOPSIS
       DOUBLE PRECISION FUNCTION DLAMCH( CMACH )

	   CHARACTER	CMACH

PURPOSE
       DLAMCH determines double precision machine parameters.

ARGUMENTS
       CMACH   (input) CHARACTER*1
	       Specifies the value to be returned by DLAMCH:
	       = 'E' or 'e',   DLAMCH := eps
	       = 'S' or 's ,   DLAMCH := sfmin
	       = 'B' or 'b',   DLAMCH := base
	       = 'P' or 'p',   DLAMCH := eps*base
	       = 'N' or 'n',   DLAMCH := t
	       = 'R' or 'r',   DLAMCH := rnd
	       = 'M' or 'm',   DLAMCH := emin
	       = 'U' or 'u',   DLAMCH := rmin
	       = 'L' or 'l',   DLAMCH := emax
	       = 'O' or 'o',   DLAMCH := rmax

	       where

       eps   = relative machine precision
	     sfmin  =  safe  minimum,  such  that  1/sfmin  does not overflow base  = base of the
	     machine prec  = eps*base t     = number of (base) digits in the mantissa rnd   = 1.0
	     when  rounding  occurs  in  addition,  0.0 otherwise emin	= minimum exponent before
	     (gradual) underflow rmin  = underflow threshold -	base**(emin-1)	emax   =  largest
	     exponent before overflow rmax  = overflow threshold  - (base**emax)*(1-eps)

LAPACK version 3.0			   15 June 2000 				DLAMCH(l)


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